The product is used for the high and low pressure protection of some refrigeration systems, such as residential, commercial ... and 1.The product is used for the high and low pressure protection of some refrigeration systems.2.such as residential, ... 1. Reset method: auto reset, manual reset2. Pressure range: extra-high (800 ~ 2,200PSI), high (145 ~ 700PSI), low (3 ~ 145PSI), vacuum (-7.4 ~ ...